Method for synchronously removing high-concentration ammonia nitrogen, iron and manganese in water through reverse flow oxygenation multi-stage catalytic oxidation

Abstract

The invention discloses a method for synchronously removing high-concentration ammonia nitrogen, iron and manganese in water through efficient catalytic oxidation. The method adopts a system consisting of a catalytic oxidation filtration system, a reverse flow oxygenation system and a back washing system, the trace oxygenation is implemented at the medium-lower part of catalytic oxidation filtering layers to guarantee that each filtering layer contains sufficient dissolved oxygen, and the catalytic oxidation capabilities of all the filtering layers are given into full play, so that the high-concentration ammonia nitrogen, iron and manganese in water are synchronously removed through catalytic oxidation; and besides, the bottom filtering layer gives full play of the function of guaranteeing filtering. The method has the advantages that the removal efficiency is high, the impact-resistant load is high, the project investment is less, the running cost is low, and the implementation difficulty is small. The method is suitable for the new construction and upgrading transformation of both surface water treatment plants and underground water treatment plants.

Description

technical field [0001] The invention belongs to the technical field of drinking water treatment, and mainly relates to a method for efficiently and synchronously removing high-concentration ammonia nitrogen, iron and manganese in water. Manganese new technologies. Background technique [0002] Due to the concentration of urban population and the relatively poor treatment of urban sewage, as well as the use of a large amount of chemical fertilizers, the ammonia nitrogen in surface water sources has reached a relatively high concentration. In 2007, ammonia nitrogen was the primary pollutant in the Yangtze River, Yellow River, Haihe River and Liaohe River, as well as the Pearl River and Huaihe River. In 2008, 19.2% of the cross-sections under national control of surface water rivers were inferior to Category V of ammonia nitrogen, and the average concentration of ammonia nitrogen in all sections was 1.9 mg / L, which only reached the standard level of Category V. It can be seen...

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Problems solved by technology

[0018] In order to solve the problem of insufficient dissolved oxygen in the middle and lower layers of the existing contact catalytic oxidation filter layer, the purpose of the present invention is to provide an economical and efficient reverse flow oxygenation multi-stage catalytic oxidation system for synchronously removing high concentrations of ammonia nitrogen, iron and manganese in water

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